Electrical warp stop motion



lg- 4, 1931 c. R. KRoNoFE 1,817,154

ELECTRICAL WARP STOP MOTION Filed July 9., 1930 Z/ l/E/v TUF? CLARENCE/ ACQUA/UFF f TM AWD/@MEMS Patented Aug. 4, 1931 easier.

CLARENCE KRONOFF, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOXVLES LOOMFHOEKS, OE WORCESTER, MASSACHUSETTS, A CORPORATION OF y' 'MASSACHUSETTS Application filed July 9,

r1`his invention relates to improvements in electrical warp stop motions and it is the general object ot the invention to permit the use ot a warp stop motion formed of a plub rality of assemble-d ysimilar units Vwherein each unit supports a Vcontact bar and also carries an energized contact 'for the live electrode ot the bar.

In a form of warp stop motion which has D gone into use there are employed Contact bars which are held in position by spacing or holding .units mounted on a threaded bar.

There are as many units as the requirements of the warp demand and when it is desired 15 to enlarge the motion more units may be added. It is a further object of my invention to provide each of these spacers or supporting members with a pair of contactsprings, one oi which. engages a live electrode ot the zo. contact bar supported by the spacer and the other of which extends to the adjacent unit so that a circuit is established through all of the units.

Each group of elements includes a spacer, 25 two electrodes and a pair of springs, the spacer having a pocket or recess to receive the contact bar which is so formed as to permit entry ot the bar without objectionable deformation of the contact spring. o With these and other obj ects in view which will appear as the description proceeds, my invention resides in the combination and arrangement oi part-s hereinafter described and set forth in the claims.

ln the accompanying drawings, wherein a convenient embodiment of my invention is set forth.

Fig. 1 is a vertical transverse section through a warp stop motion made according e to my invention,

Fig. 2 is a vertical section on line 2-2 of Fig. 1.

Fig. 3 shows two units in spaced relation betoiebeing assembled, and .3 Fig. 4 is a vertical section on line 4*4. f of Fig. 2 showing the manner of supporting and insulating the contacts from the spacing units.

As shown in Figs. 1 and 2, I provide a 5a threaded rod 1() which may extend parallel ELECTRICAL VJARP STOP MOTION Serial No. 466,623.

to the warp 1V and have a pair of clamping nuts 11 and 12 between which are located a plurality of substantially similar spacing units 13 and an end member 14. Each ot the units 13 is provided with a pocket or iti recess 15 having a lower supporting surface 16 on which rests a contact bar designated generally at 17. The bar has an outer inclosing electrode 18 which may be grounded through the spacing units and rod 10 and :3 5 said bar also has an inner live electrode 19 insulated from the other electrode. A rib 20 runs longitudinally along the grounded electrode and cooperates with a drop wire D which when fallen due to warp fault is eiective to electrically contact the live and grounded electrodes of the corresponding bar and thus effect stoppage of a loom or other machine to which the motion may be applied. The nuts 11 and 12 clamp the spacing units 2e together so that they form in effect a unitary structure mounted on the bar 10.

The matter thus far described may be substantially the same as set forth in co-pending application Ser. No. 462,651 filed by 2i Payne.

Each of the units 13, and also the end member 14, is provided with a lateral extension having a bore 31 in which is located an insulating bushing 32. A bolt 33 of current Si; conducting material extends through the bushing and is electrically insulated from the extension 30 by means of upper and lower insulating washers 34. and 35, respectively. Between the bolt head 36 and the 125 washer 34; lie the feet of two contact springs one of which extends upwardly as at 37 and the other of which projects horizontally at 38. A nut 39 on the bottom part otl the bolt holds thesprings in position with re spect t0 the corresponding spacer or unil'.

The upwardly projecting spring 37 has a rounded portion 40 which is adapted for engagement with the live electrode 19. The rounded portion does not extend to the top of the notch but preferably engages the live electrode intermeditate its top and bottom. and if desired opposite the rib 20. The reason for this construction is to permit a suficient opening between the spring contact v0 and the top 41 of unit Which defines the upper e-ndoi' the notch l5 to permit ready entry or" the Contact bar. The horizontal spring 38 extends to the head of the bolt on the adjacent unit so t iat the contacts of all et said units are electrically connected. rllie lead-in Wire 42 may beconnected to any of the bolts7 but as shown herein is held to the bolt carried bythe end member. By the construction set orthherein' each of the units 13 has associatedv therewith Vlive and grounded electrodes together With a pair of contacts all of which form a group of elements movable as a Whole to position on the rod l0. The contact bar is positioned with `respect to iscorresponding spacer 13 as is also the spring 87, so that thereis rery little it anyvariation in the relation oi' thesetvvo parts and even though adjacent spacers be separated by different amounts there will still be proper Contact between each live electrode and its spring.

From the foregoing it Will be seen-that kI lhave provided a simple means for electrically connectingthe live electrodes of contact Yoit a Warp stop motion built upon the Unit principle wherein any desired number oi groups of elements may be employerhand that. each group has a spacer which determines the position of its corresponding live electrode and a spring 37 carried thereby.

Having thus described my invention it will beseen that changes and modifications may be made therein by those skilled in the-art Without departing from the spirit and scope of the invention and I do not Wish to be limited to the details herein disclosed, but What I claim is: y

l. Iny an electrical Warp stop motion, a plurality of groups ofelements, each group containing` an electrode to be energized, a separate supporting spacing unit to -hold the electrode, and arcontact device to engage the electrode said contact device being supported by the same spacing unit which supports the electrode in .contact therewith,y each supporting unit being removable inde pendently of the other units.

2. In an electrical 4Warp stop motion, a n

` adjacent each other to form a substantially unitary structure, each group 'including a spacer having a pocket7 a contact bar located in the pocket and havingra live electrede, and a contact spring on the spacer trode in the pocket. g3. In an electrical Warp stop motion', a plurality of similar groups of elements held land havin@r engagement with the live elecadjacent each other to form a substantiallyy unitary structure, each group including a spacer, a contact bar having -a live electrode supported by the spacer and lying between two. adjacent spacers, and an electric'contact spring device carried by each spacer and normally held in contacting relation with the live electrode Vsupported by said spacer.

4. In an electrical Warp stop motion, aplurality of groups of elements held adjacent each other to form a substantially unitary structure, each group having an insulated live electrode and a contact spring device, and each group further having a common support for the live electrode and contact device engaging the same.

5. In an electrical Warp stop motion, a plurality of groups of elements held adjacent each other 'to form a substantially unitary structure, each. group including a supporting unit, a live Aelectrode mounted on the supporting unit to have engagement .with a drop Wire, and a contact spring for the electrode, said electrode and spring being insulated from the supporting unit and being movable with the latter Without relative motion with respect thereto. t

t 6. In an electrical Warp stop motion, a plurality of similar groups of elements held adjacent each other to form a substantially unitary structure, a Contact bar having a live electrode, a springto have direct contact .Withthe live electrode, and a supporting and spacing unit for the bar and spring, said bar and spring being mounted on and movable With the unit Without movement relative to each other or With respect to the unit.

rIn testimony whereof I have hereunto aliiaed my signature.

CLARENCE Il. KRONOFF. 

